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diff --git a/macosx/ExtInput.h b/macosx/ExtInput.h
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+/*******************************************************************************
+
+Copyright (c) 2007 Adobe Systems Incorporated
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+********************************************************************************/
+
+#ifndef _ExtInput_h
+#define _ExtInput_h
+
+#include <Carbon/Carbon.h>
+#include "Scintilla.h"
+
+namespace Scintilla
+{
+
+/**
+The ExtInput class provides TSM input services to Scintilla.
+It uses the indicators 0 and 1 (see SCI_INDICSETSTYLE) to apply
+underlines to partially converted text.
+*/
+
+class ExtInput
+{
+public:
+	/**
+	Attach extended input to a HIView with attached Scintilla. This installs the needed
+	event handlers etc.
+	*/
+	static	void		attach (HIViewRef ref);
+	/**
+	Detach extended input from a HIViewwith attached Scintilla. 
+	*/
+	static	void		detach (HIViewRef ref);
+	/**
+	Activate or deactivate extended input. This method should be called whenever
+	the view gains or loses focus.
+	*/
+	static	void		activate (HIViewRef ref, bool on);
+	/**
+	Terminate extended input.
+	*/
+	static	void		stop (HIViewRef ref);
+};
+
+}	// end namespace
+
+#endif